Why humans had built so many robot soldiers was unclear, although the robots themselves had a variety of theories to justify their existence. Uncharles heard that human soldiers were less capable of making war than robots, or else less willing and reliable than robots. He also heard that other humans elsewhere had built robot soldiers, and the local humans had then had to build their own to avoid there being a robot soldier gap. Nobody seemed to ask why soldiers at all. Apparently the existence of soldiers was a fundamental given in their cosmology.
